Crowned spiropyran fluoroionophores with a carboxyl moiety for the selective detection of lithium ions
作者:D. B. Stubing、S. Heng、A. D. Abell
DOI:10.1039/c6ob00468g
日期:——
The absorbance and fluorescence spectra of carboxylated spiropyrans containing methyl-1-aza-12-crown-4, methyl-1-aza-15-crown-5, methyl-1-aza-18-crown-6 moieties are compared. Characteristic changes in spectra after addition of the alkali metal salts of Li+, Na+, K+ and Cs+ were observed. Chromism induced by the binding of the metal cations was observed as an increase in absorbance and fluorescence
比较了含甲基-1-氮杂-12-皇冠-4,甲基-1-氮杂-15-皇冠-5,甲基-1-氮杂-18-皇冠-6部分的羧化螺吡喃的吸光度和荧光光谱。观察到在添加了Li +,Na +,K +和Cs +的碱金属盐后光谱的特征变化。观察到由金属阳离子的结合引起的色度随着吸光度和荧光的增加而增加。在这些金属阳离子中,Li +离子在所有三个螺吡喃系统中产生了最大的变化。在交替的352 nm紫外线和白光照射下,可以观察到螺吡喃-金属配合物的可逆光开关。这导致基于可逆的基于荧光的锂离子感测,具有在生物传感器装置中使用的潜力。